Question

One mole of Ideal Gas Expands freely at 310 K from 5L Volume to 10L volume. Then $\Delta U$ and $\Delta H$ of the process are respectively

• A. 0 and 5 cal
• B. 0 and 1500 cal
• C. 0 and 0
• D. 5 and 0 cal.

Answer 1

The correct option is C

0 and 0

For, Ideal Gas expansion $\Delta U=0.\Delta H=\Delta U+P\Delta V$.

Since, expansion is free, i.e., Pext = 0.

Hence $\Delta H=0+0=0$.